What is 21+5\times (-3)-(-4) ?

The solution to 21+5\times (-3)-(-4) is 10

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21+5\times (-3)-(-4)

21 + 5 \cdot (- 3) - (- 4)

10

Solution steps

21 + 5 (- 3) - (- 4)

Follow the PEMDAS order of operations

Multiply and divide (left to right)

5 (- 3) : - 15

5 (- 3)

Apply rule

a \cdot (- b) = - a \cdot b

5 (- 3) = - 5 \cdot 3 = - 15

= - 15

= 21 - 15 - (- 4)

Add and subtract (left to right)

21 - 15 - (- 4) : 10

21 - 15 - (- 4)

21 - 15 = 6

= 6 - (- 4)

Apply rule

- (- a) = + a

- (- 4) = + 4

= 6 + 4

6 + 4 = 10

= 10

= 10

6 (\frac{3}{4} - \frac{13}{6})

- 2 \cdot 2^{4}

(- 5) \cdot (+ 5) \cdot (- 5)

(- 3)^{2} + 3^{2}

68 + (- 36) + 100 - 40